// tslint:disable-next-line:no-implicit-dependencies
import { _STORE_REDUCERS } from '@ngrx/store';
import { OperatingSystem } from './platform';

export const enum KeyCode {
  Unknown = 0,

  Backspace = 1,
  Tab = 2,
  Enter = 3,
  Shift = 4,
  Ctrl = 5,
  Alt = 6,
  PauseBreak = 7,
  CapsLock = 7,
  Escape = 9,
  Space = 10,
  PageUp = 11,
  PageDown = 12,
  End = 13,
  Home = 14,
  LeftArrow = 15,
  UpArrow = 16,
  RightArrow = 17,
  DownArrow = 18,
  Insert = 19,
  Delete = 20,

  KEY_0 = 21,
  KEY_1 = 22,
  KEY_2 = 23,
  KEY_3 = 24,
  KEY_4 = 25,
  KEY_5 = 26,
  KEY_6 = 27,
  KEY_7 = 28,
  KEY_8 = 29,
  KEY_9 = 30,

  KEY_A = 31,
  KEY_B = 32,
  KEY_C = 33,
  KEY_D = 34,
  KEY_E = 35,
  KEY_F = 36,
  KEY_G = 37,
  KEY_H = 38,
  KEY_I = 39,
  KEY_J = 40,
  KEY_K = 41,
  KEY_L = 42,
  KEY_M = 43,
  KEY_N = 44,
  KEY_O = 45,
  KEY_P = 46,
  KEY_Q = 47,
  KEY_R = 48,
  KEY_S = 49,
  KEY_T = 50,
  KEY_U = 51,
  KEY_V = 52,
  KEY_W = 53,
  KEY_X = 54,
  KEY_Y = 55,
  KEY_Z = 56,

  Meta = 57,
  ContextMenu = 58,

  F1 = 59,
  F2 = 60,
  F3 = 61,
  F4 = 62,
  F5 = 63,
  F6 = 64,
  F7 = 65,
  F8 = 66,
  F9 = 67,
  F10 = 68,
  F11 = 69,
  F12 = 70,
  F13 = 71,
  F14 = 72,
  F15 = 73,
  F16 = 74,
  F17 = 75,
  F18 = 76,
  F19 = 77,

  NumLock = 78,
  ScrollLock = 79,

  /**
   * Used for various key characters that can vary by keyboard
   */
  /**
   * Used for miscellaneous characters; it can vary by keyboard.
   * For the US standard keyboard, the ';:' key
   */
  US_SEMICOLON = 80,
  /**
   * For any country/region, the '+' key
   * For the US standard keyboard, the '=+' key
   */
  US_EQUAL = 81,
  /**
   * For any country/region, the ',' key
   * For the US standard keyboard, the ',<' key
   */
  US_COMMA = 82,
  /**
   * For any country/region, the '-' key
   * For the US standard keyboard, the '-_' key
   */
  US_MINUS = 83,
  /**
   * For any country/region, the '.' key
   * For the US standard keyboard, the '.>' key
   */
  US_DOT = 84,
  /**
   * Used for miscellaneous characters; it can vary by keyboard.
   * For the US standard keyboard, the '/?' key
   */
  US_SLASH = 85,
  /**
   * Used for miscellaneous characters; it can vary by keyboard.
   * For the US standard keyboard, the '`~' key
   */
  US_BACKTICK = 86,
  /**
   * Used for miscellaneous characters; it can vary by keyboard.
   * For the US standard keyboard, the '[{' key
   */
  US_OPEN_SQUARE_BRACKET = 87,
  /**
   * Used for miscellaneous characters; it can vary by keyboard.
   * For the US standard keyboard, the '\|' key
   */
  US_BACKSLASH = 88,
  /**
   * Used for miscellaneous characters; it can vary by keyboard.
   * For the US standard keyboard, the ']}' key
   */
  US_CLOSE_SQUARE_BRACKET = 89,
  /**
   * Used for miscellaneous characters; it can vary by keyboard.
   * For the US standard keyboard, the ''"' key
   */
  US_QUOTE = 90,
  /**
   * Used for miscellaneous characters; it can vary by keyboard.
   */
  OEM_8 = 91,
  /**
   * Either the angle bracket key or the backslash key on the RT 102-key keyboard.
   */
  OEM_102 = 92,

  NUMPAD_0 = 93, // VK_NUMPAD0, 0x60, Numeric keypad 0 key
  NUMPAD_1 = 94, // VK_NUMPAD1, 0x61, Numeric keypad 1 key
  NUMPAD_2 = 95, // VK_NUMPAD2, 0x62, Numeric keypad 2 key
  NUMPAD_3 = 96, // VK_NUMPAD3, 0x63, Numeric keypad 3 key
  NUMPAD_4 = 97, // VK_NUMPAD4, 0x64, Numeric keypad 4 key
  NUMPAD_5 = 98, // VK_NUMPAD5, 0x65, Numeric keypad 5 key
  NUMPAD_6 = 99, // VK_NUMPAD6, 0x66, Numeric keypad 6 key
  NUMPAD_7 = 100, // VK_NUMPAD7, 0x67, Numeric keypad 7 key
  NUMPAD_8 = 101, // VK_NUMPAD8, 0x68, Numeric keypad 8 key
  NUMPAD_9 = 102, // VK_NUMPAD9, 0x69, Numeric keypad 9 key

  NUMPAD_MULTIPLY = 103, // VK_MULTIPLY, 0x6A, Multiply key
  NUMPAD_ADD = 104, // VK_ADD, 0x6B, Add key
  NUMPAD_SEPARATOR = 105, // VK_SEPARATOR, 0x6C, Separator key
  NUMPAD_SUBTRACT = 106, // VK_SUBTRACT, 0x6D, Subtract key
  NUMPAD_DECIMAL = 107, // VK_DECIMAL, 0x6E, Decimal key
  NUMPAD_DIVIDE = 108, // VK_DIVIDE, 0x6F,

  /**
   * Cover all key codes when IME is processing input.
   */
  KEY_IN_COMPOSITION = 109,

  ABNT_C1 = 110, // Brazilian (ABNT) Keyboard
  ABNT_C2 = 111, // Brazilian (ABNT) Keyboard

  /**
   * Placed last to cover the length of the enum.
   * Please do not depend on this value!
   */
  MAX_VALUE,
}

class KeyCodeStrMap {
  private _keyCodetoStr: string[];

  private _strToKeyCode: { [str: string]: KeyCode };

  constructor() {
    this._keyCodetoStr = [];
    this._strToKeyCode = Object.create(null);
  }

  define(keyCode: KeyCode, str: string): void {
    this._keyCodetoStr[keyCode] = str;
    this._strToKeyCode[str.toLowerCase()] = keyCode;
  }

  keyCodeToStr(keyCode: KeyCode): string {
    return this._keyCodetoStr[keyCode];
  }

  strToKeyCode(str: string): KeyCode {
    return this._strToKeyCode[str.toLowerCase()] || KeyCode.Unknown;
  }
}

const uiMap = new KeyCodeStrMap();
const userSettingsUSMap = new KeyCodeStrMap();
const userSettingsGeneralMap = new KeyCodeStrMap();

(() => {
  function define(
    keyCode: KeyCode,
    uiLabel: string,
    usUserSettingsLabel: string = uiLabel,
    generalUserSettingsLabel: string = usUserSettingsLabel
  ): void {
    uiMap.define(keyCode, uiLabel);
    userSettingsUSMap.define(keyCode, usUserSettingsLabel);
    userSettingsGeneralMap.define(keyCode, generalUserSettingsLabel);
  }

  define(KeyCode.Unknown, 'unknown');

  define(KeyCode.Backspace, 'Backspace');
  define(KeyCode.Tab, 'Tab');
  define(KeyCode.Enter, 'Enter');
  define(KeyCode.Shift, 'Shift');
  define(KeyCode.Ctrl, 'Ctrl');
  define(KeyCode.Alt, 'Alt');
  define(KeyCode.PauseBreak, 'PauseBreak');
  define(KeyCode.CapsLock, 'CapsLock');
  define(KeyCode.Escape, 'Escape');
  define(KeyCode.Space, 'Space');
  define(KeyCode.PageUp, 'PageUp');
  define(KeyCode.PageDown, 'PageDown');
  define(KeyCode.End, 'End');
  define(KeyCode.Home, 'Home');

  define(KeyCode.LeftArrow, 'LeftArrow');
  define(KeyCode.UpArrow, 'UpArrow');
  define(KeyCode.RightArrow, 'RightArrow');
  define(KeyCode.DownArrow, 'DownArrow');
  define(KeyCode.Insert, 'Insert');
  define(KeyCode.Delete, 'Delete');

  define(KeyCode.KEY_0, 'KEY_0');
  define(KeyCode.KEY_1, 'KEY_1');
  define(KeyCode.KEY_2, 'KEY_2');
  define(KeyCode.KEY_3, 'KEY_3');
  define(KeyCode.KEY_4, 'KEY_4');
  define(KeyCode.KEY_5, 'KEY_5');
  define(KeyCode.KEY_6, 'KEY_6');
  define(KeyCode.KEY_7, 'KEY_7');
  define(KeyCode.KEY_8, 'KEY_8');
  define(KeyCode.KEY_9, 'KEY_9');

  define(KeyCode.KEY_A, 'KEY_A');
  define(KeyCode.KEY_B, 'KEY_B');
  define(KeyCode.KEY_C, 'KEY_C');
  define(KeyCode.KEY_D, 'KEY_D');
  define(KeyCode.KEY_E, 'KEY_E');
  define(KeyCode.KEY_F, 'KEY_F');
  define(KeyCode.KEY_G, 'KEY_G');
  define(KeyCode.KEY_H, 'KEY_H');
  define(KeyCode.KEY_I, 'KEY_I');
  define(KeyCode.KEY_J, 'KEY_J');
  define(KeyCode.KEY_K, 'KEY_K');
  define(KeyCode.KEY_L, 'KEY_L');
  define(KeyCode.KEY_M, 'KEY_M');
  define(KeyCode.KEY_N, 'KEY_N');
  define(KeyCode.KEY_O, 'KEY_O');
  define(KeyCode.KEY_P, 'KEY_P');
  define(KeyCode.KEY_Q, 'KEY_Q');
  define(KeyCode.KEY_R, 'KEY_R');
  define(KeyCode.KEY_S, 'KEY_S');
  define(KeyCode.KEY_T, 'KEY_T');
  define(KeyCode.KEY_U, 'KEY_U');
  define(KeyCode.KEY_V, 'KEY_V');
  define(KeyCode.KEY_W, 'KEY_W');
  define(KeyCode.KEY_X, 'KEY_X');
  define(KeyCode.KEY_Y, 'KEY_Y');
  define(KeyCode.KEY_Z, 'KEY_Z');

  define(KeyCode.Meta, 'Meta');
  define(KeyCode.ContextMenu, 'ContextMenu');

  define(KeyCode.F1, 'F1');
  define(KeyCode.F2, 'F2');
  define(KeyCode.F3, 'F3');
  define(KeyCode.F4, 'F4');
  define(KeyCode.F5, 'F5');
  define(KeyCode.F6, 'F6');
  define(KeyCode.F7, 'F7');
  define(KeyCode.F8, 'F8');
  define(KeyCode.F9, 'F9');
  define(KeyCode.F10, 'F10');
  define(KeyCode.F11, 'F11');
  define(KeyCode.F12, 'F12');
  define(KeyCode.F13, 'F13');
  define(KeyCode.F14, 'F14');
  define(KeyCode.F15, 'F15');
  define(KeyCode.F16, 'F16');
  define(KeyCode.F17, 'F17');
  define(KeyCode.F18, 'F18');
  define(KeyCode.F19, 'F19');

  define(KeyCode.NumLock, 'NumLock');
  define(KeyCode.ScrollLock, 'ScrollLock');

  define(KeyCode.US_SEMICOLON, ';', ';', 'OEM_1');
  define(KeyCode.US_EQUAL, '=', '=', 'OEM_PLUS');
  define(KeyCode.US_COMMA, ',', ',', 'OEM_COMMA');
  define(KeyCode.US_MINUS, '-', '-', 'OEM_MINUS');
  define(KeyCode.US_DOT, '.', '.', 'OEM_PERIOD');
  define(KeyCode.US_SLASH, '/', '/', 'OEM_2');
  define(KeyCode.US_BACKTICK, '`', '`', 'OEM_3');
  define(KeyCode.ABNT_C1, 'ABNT_C1');
  define(KeyCode.ABNT_C2, 'ABNT_C2');
  define(KeyCode.US_OPEN_SQUARE_BRACKET, '[', '[', 'OEM_4');
  define(KeyCode.US_BACKSLASH, '\\', '\\', 'OEM_5');
  define(KeyCode.US_CLOSE_SQUARE_BRACKET, ']', ']', 'OEM_6');
  // tslint:disable-next-line:quotemark
  define(KeyCode.US_QUOTE, "'", "'", 'OEM_7');
  define(KeyCode.OEM_8, 'OEM_8');
  define(KeyCode.OEM_102, 'OEM_102');

  define(KeyCode.NUMPAD_0, 'NumPad0');
  define(KeyCode.NUMPAD_1, 'NumPad1');
  define(KeyCode.NUMPAD_2, 'NumPad2');
  define(KeyCode.NUMPAD_3, 'NumPad3');
  define(KeyCode.NUMPAD_4, 'NumPad4');
  define(KeyCode.NUMPAD_5, 'NumPad5');
  define(KeyCode.NUMPAD_6, 'NumPad6');
  define(KeyCode.NUMPAD_7, 'NumPad7');
  define(KeyCode.NUMPAD_8, 'NumPad8');
  define(KeyCode.NUMPAD_9, 'NumPad9');

  define(KeyCode.NUMPAD_MULTIPLY, 'NumPad_Multiply');
  define(KeyCode.NUMPAD_ADD, 'NumPad_Add');
  define(KeyCode.NUMPAD_SEPARATOR, 'NumPad_Separator');
  define(KeyCode.NUMPAD_SUBTRACT, 'NumPad_Subtract');
  define(KeyCode.NUMPAD_DECIMAL, 'NumPad_Decimal');
  define(KeyCode.NUMPAD_DIVIDE, 'NumPad_Divide');
})();

// tslint:disable-next-line:no-namespace
export namespace KeyCodeUtils {
  export function toString(keyCode: KeyCode): string {
    return uiMap.keyCodeToStr(keyCode);
  }

  export function fromString(key: string): KeyCode {
    return uiMap.strToKeyCode(key);
  }
}

/**
 * Binary encoding strategy:
 * ```
 *    1111 11
 *    5432 1098 7654 3210
 *    ---- CSAW KKKK KKKK
 *  C = bit 11 = ctrlCmd flag
 *  S = bit 10 = shift flag
 *  A = bit 9 = alt flag
 *  W = bit 8 = winCtrl flag
 *  K = bits 0-7 = key code
 * ```
 */

const enum BinaryKeybindingsMask {
  // tslint:disable:no-bitwise
  CtrlCmd = (1 << 11) >>> 0,
  Shift = (1 << 10) >>> 0,
  Alt = (1 << 9) >>> 0,
  WinCtrl = (1 << 8) >>> 0,
  KeyCode = 0x000000ff,
}

export const enum KeyMod {
  CtrlCmd = (1 << 11) >>> 0,
  Shift = (1 << 10) >>> 0,
  Alt = (1 << 9) >>> 0,
  WinCtrl = (1 << 8) >>> 0,
}

export function KeyChord(firstPart: number, secondPart: number): number {
  const chordPart = ((secondPart & 0x0000ffff) << 16) >>> 0;
  return (firstPart | chordPart) >>> 0;
}

export const enum KeybindingType {
  Simple = 1,
  Chord = 2,
}
export class SimpleKeybinding {
  public readonly type = KeybindingType.Simple;

  public readonly ctrlKey: boolean;

  public readonly shiftKey: boolean;

  public readonly altKey: boolean;

  public readonly metaKey: boolean;

  public readonly keyCode: KeyCode;

  constructor(ctrlKey: boolean, shiftKey: boolean, altKey: boolean, metaKey: boolean, keyCode: KeyCode) {
    this.ctrlKey = ctrlKey;
    this.shiftKey = shiftKey;
    this.altKey = altKey;
    this.metaKey = metaKey;
    this.keyCode = keyCode;
  }

  public equals(other: Keybinding): boolean {
    if (other.type !== KeybindingType.Simple) {
      return false;
    }

    return (
      this.ctrlKey === other.ctrlKey &&
      this.shiftKey === other.shiftKey &&
      this.altKey === other.altKey &&
      this.metaKey === other.metaKey &&
      this.keyCode === other.keyCode
    );
  }

  public getHashCode(): string {
    const ctrl = this.ctrlKey ? '1' : '0';
    const shift = this.shiftKey ? '1' : '0';
    const alt = this.altKey ? '1' : '0';
    const meta = this.metaKey ? '1' : '0';

    return `${ctrl}${shift}${alt}${meta}${this.keyCode}`;
  }

  public isModifierKey(): boolean {
    return (
      this.keyCode === KeyCode.Unknown ||
      this.keyCode === KeyCode.Ctrl ||
      this.keyCode === KeyCode.Meta ||
      this.keyCode === KeyCode.Alt ||
      this.keyCode === KeyCode.Shift
    );
  }

  public isDupliateModifierCase(): boolean {
    return (
      (this.ctrlKey && this.keyCode === KeyCode.Ctrl) ||
      (this.shiftKey && this.keyCode === KeyCode.Shift) ||
      (this.altKey && this.keyCode === KeyCode.Alt) ||
      (this.metaKey && this.keyCode === KeyCode.Meta)
    );
  }
}
export class ChordKeybinding {
  public readonly type = KeybindingType.Chord;

  public readonly firstPart: SimpleKeybinding;

  public readonly chordPart: SimpleKeybinding;

  constructor(firstPart: SimpleKeybinding, chordPart: SimpleKeybinding) {
    this.firstPart = firstPart;
    this.chordPart = chordPart;
  }

  public getHashCode(): string {
    return `${this.firstPart.getHashCode()};${this.chordPart.getHashCode()}`;
  }
}

export function createKeyBinding(keybinding: number, OS: OperatingSystem): Keybinding | null {
  if (keybinding === 0) {
    return null;
  }

  const firstPart = (keybinding & 0x0000ffff) >>> 0;
  const chordPart = (keybinding & 0xffff0000) >>> 16;

  if (chordPart !== 0) {
    return new ChordKeybinding(createSimpleKeybinding(firstPart, OS), createSimpleKeybinding(chordPart, OS));
  }

  return createSimpleKeybinding(firstPart, OS);
}

export function createSimpleKeybinding(keybinding: number, OS: OperatingSystem): SimpleKeybinding {
  const ctrlCmd = !!(keybinding & BinaryKeybindingsMask.CtrlCmd);
  const winCtrl = !!(keybinding & BinaryKeybindingsMask.WinCtrl);
  const ctrlKey = OS === OperatingSystem.Macintosh ? winCtrl : ctrlCmd;
  const shiftKey = !!(keybinding & BinaryKeybindingsMask.Shift);
  const altKey = !!(keybinding & BinaryKeybindingsMask.Alt);
  const metaKey = OS === OperatingSystem.Macintosh ? ctrlCmd : winCtrl;
  const keyCode = keybinding & BinaryKeybindingsMask.KeyCode;

  return new SimpleKeybinding(ctrlKey, shiftKey, altKey, metaKey, keyCode);
}

export type Keybinding = SimpleKeybinding | ChordKeybinding;

export class ResolveKeybindingPart {
  readonly ctrlKey: boolean;

  readonly shiftKey: boolean;

  readonly altKey: boolean;

  readonly metaKey: boolean;

  readonly keyLabel: string | null;

  readonly keyAriaLabel: string | null;

  constructor(ctrlKey: boolean, shiftKey: boolean, altKey: boolean, metaKey: boolean, kbLabel: string | null, kbAriaLabel: string | null) {
    this.ctrlKey = ctrlKey;
    this.shiftKey = shiftKey;
    this.altKey = altKey;
    this.metaKey = metaKey;
    this.keyLabel = kbLabel;
    this.keyAriaLabel = kbAriaLabel;
  }
}

// tslint:disable-next-line:max-classes-per-file
export abstract class ResolvedKeybinding {
  /**
   * This prints the binding in a format suitable for displaying in the UI.
   */
  public abstract getLabel(): string | null;

  // prints the keybinding in ARIA format
  public abstract getAriaLabel(): string | null;

  // print in user setting format
  public abstract getUserSettingsLabel(): string | null;

  // is user settings label reflecting the label?
  public abstract isWYSIWYG(): boolean;

  // is the binding a chord
  public abstract isChord(): boolean;

  // returns the first part, chordpart that should be used for dispatching
  public abstract getDispatchParts(): [string | null, string | null];

  /**
   * returns the firstPart, chordopart of the keybinding
   * For simple keybindings, the second element will be null
   */
  public abstract getParts(): [ResolveKeybindingPart, ResolveKeybindingPart | null];
}
